Air-compressor.



J. W. GARDNER.

AIB. COMPRESSOR. APPLICATION HLBD JULY19,1909.

Patented Sept 20,1910.

2 SHEETS-SHEET 1.

J. W. GARDNER. A1B COMPRESSOR. APPLIonIoN FILED JULY1o,19oa.

970,487. Patented Sept. 20, 1910.

2 snnn'rs-snmz'r 2.

UNITED .sTATEs PATENT oEEIcE.

IoI'IN WILLIs GARDNER, lor oUINoY, ILLINoIs.

Ain-COMPRESSOR.

970,487." Sroication 0f Letter Patent Patented Sept. 20, 1910.

Application lld July 19, 1909. Serial No. 508,427.

" 'To all toll/om 'it concern: ing andare adapted to support the o erating Be it known that I, JonfN WILLIS GARD- shaft 5. 12, 12' designate the ot ier two NEn'-, a citizen or! the United States, and a walls of the lower portion of the crank casresident of Quincy, in the' county of Adams ing which slope inwardly and upwardly, and 60 and State of Illinois, have invented certain terminate'in an upper cylindrical portion new and useful inprovements in Air-Com- 13 of the said casing. The sloping walls 12, pressorsg' and I do hereby declare that the 12 of the crank casing are provided with ollowingis a full, clear, and exact descripope'nings 14, 14 which are covered by glass tionthereof, reference being had to the acplates 15, 15 through which' the interior of 65 company/ing drawings, and to the numerals the said crank ca sin may be viewed. The

n i of reference fna-rked' thereon, which form a 'said casing is close at its bottom portion part of this specification. and is ada ted to contain a quantity of oil This invention relates to air compressors or other lu ricant 16. 17 designates a tap and more particularly to certain im roveor faucet which opens into the lower portion 70 ments: in air compressors of a vertica type. ofthe crank casing and through which the The ob`ec'ts of the invention are to prooil o r lubricant in the casing may be withvide nove means for economically and eiidrawn. ciently oiling operating parts; for re- VInstead of lubricatin the bearing within venting 'the oil yfrom being splashed or ot erthe crank casing by ling same u'p to a 75 wise drawn up into the compression cylinsuiicient level with oil to permit the crank der; to provide means for adjusting the arm to be dipped therein during the rotaupon its seat without the use of auxiliary cure :V Figure 1 is a vertical cross-sectiontl yand splash or throw the oilto-the bearings. 85 View of an air compressor embodying my in- The pins or projections thusarranged, not vention. Fig. 2 is a vertical cross-sectional only furnish a suilicient amount of oil to the Y. sectional view of the crank casing, taken at passing therethrough ofthe larger metal charge valve and seat therefor. Fig. 6 is a casing, by reducing the. parts which pass L 'l provided withinthesaid casing with a crank baille plates are formed integrally with the pression piston 9 in a well known manner. rod 8 moves, said slot or opening -in each The' lower portion of the crank casing 6 is l plate being of sufficientlength to permit the cured horizontally arranged journal bearas illustrated in Fi s.'3 and 4, or may be arclearance' in the 'air cylinder as wear may tion of the o eratin shaft it is preferable occur between the connecting rod and the to lower the evel o the oil in the said cascrafnk shaft; and to provide a novel mea-ns in and to providetwo oiling pins or suit- 80 whereby the -discharge valve ray be ground ab e dprojectionsQO, 20 which are firmly seto the crank arm or connecting rod,

guides. v and which are so arranged that the rotation Inv the drawings illustrating this in'venof the crank causes' them to dip into the oil view of the air com ressor taken at ri ht bearing parts to maintain the said bearing angles to the lane o thefirst section.- l* ig. parts at a suiciently ,low running tempera- 3 isa. vertica detail sectional view of the ture, but they eliminate excessive s lashing 90 crank casing. Fig. 4 is a vertical detail of the oil which must necessarily fo low the right an les to' the plane of the vsection in parts, which splashing is found to be very Fig. 3. ig. 5 is a plan view of the upier detrimental to the air cylinder. In addition en of the piston head illustrating the isto reducing the splashing of oil in the crank 95 horizontal cross-section View of the cylintherethrough, additional precaution is taken drical ortion of the crank casing. I for preventing oil from entering the air cyl- In t e drawings, 5 designates the operatinder which consists in providin in the ing' shaft of the compressor which is rotacylindrical portion 13 of the cran casin 100 tively mounted in a crank casing 6 and lis one or more bailie plates 25, 25. The sai arm 7. Journaled at its lower end upon the said casing or attached thereto and each is said crank arm 7 is a connecting rod Swhich provided in its central plortion with a slot is connected at its upper end 'with a comor opening 26 through w ich the connecting 105 generally rectangular in shape, said lower connecting rod to oscillate reely 1n the casrtion being formed with twovper'pendicuing. The said baffle plates 25, 25 may be ar walls 10, 10 to which are removably searranged horizontally one above the other, 110

ings 1.1, 11 which extend into the said casranged at an ang e to the horizontal, as

' which the air is drawn into and indicated at 25, 25 in Figs. 1 and 2. The latter is the preferred'arrangement, as the slope of said plates causes them to more readilv shed the oil. They are provided near their outer margins adjacent to the wall of the crank casing with drain holes or openings 27, 27 through which oil collected upon the tops ofthe said plates may be drained into the casing below.

Recesses 30, 30 are formed in the tops of the bearings 11, 11,'below the drain holes in position to receive the oil shed from the bafie lates. Oil openings 31,v at the bottom of sald recesses direct the oil into the bearings of the shaft 5.

In order to guard against the creating of a vacuum in the crank casing which would have a tendency to draw the fine particles of oil up into the air cylinder there are provided in the upper part of the crank casin 10 and above the upper baiiie plate '25 two oppositely located openings 32, 32 through dischar ed from the crank casing during the operatlon ofthe parts therein.

35 designates, as a whole, an air cylinder of the usual form which is cast separately from the crank casing and is adapted to be secured thereto in any suitable manner. lin the specific form shown, the said air cylinder is provided on its lower end with a reduced portion 36 which projects through an opening in the upper end of the crank casing and sfurther provided adjacent to its lower endif with an external annular dange 37 which rests upon the upper ortion of the said crank casing. interposed3 between the lower face of the annular flange 37 and the adjacent face of thelcrank casing are metal washers or shims'38, 38 which are clamped tlghtly between the bearin surfaces by means of studs 39, 39 exten ing upwardly through the said shims and the annular anges 37 and provided on their outer ends with clamping nuts 40, 40. The said shims not only form a tight joint between the air cylinder and crank casing but form means whereby'` correction may be made for the wear between the connecting rod and crank shaft. 'Surrounding the air cylinder 35 are two annular chambers 42 and 43 which constitute air and water supply chambers, re-

spectively, the chamber 42 being the one throu h which air is supplied to the cylinder for t e purpose of com ression, and the c hamber 43 beingwadap for the circulation of water for cooling purposes. `Removably secured` to the cylinder 35 is a closing cap 45.

discharge valve'disk 50 of any ordinary type -is located at the upper-end of the air cylinder resting upon a valve seat 51 formed 1n the upper end of the said cylinder. Formed lntegrally with the said valve seat 51 are a plurality of radially arranged lugs 'margin of the valve disk 50 upper end of the airtraes? 52, 52 which project inw-idly toward the center of the `cylinder and a ainst which the ars when sald upon its seat. The said lugs y form a guide for the valve disk is rest-in 52, 52 not on disk same but form a guiding means whereby. the said disk may be groun upon its seat without the use of a grinding jig or other auxlliary guidin means. The valve dlsk 50'1s normally he d place thereon coil actuating after operation by means of a spring 55. The said spring, which rests at its lower end upon the upper face of the valve' disk, engages at itsxupper end with a conical lug 56 which in turn is engaged by the lower end of ans-adjusting screw 57. Said adjusting screw is inserted through a screw-threaded aperture in a raised portion-58 formed upon the closing cap 45 and may be adjusted to vary the pressure of the spring 55. j

1n the operation of the compressor, the compressed air acts upon the lower face of the valve disk 50 to raise it from its seat and permit the air to pass upwardly into a of the air cylinder and the closing cap 45 from whence it passes outwardly'through a pipe 69 into a tank or other collecting means. The advantages gained` in constructing an air compressor .in the mannerdescribed are manifest it being readily apparent that the nkeihood of au being thrown or drawn up into the air cylinder is reduced to a minimum due to the small quantity of the lubricant which -is gathered u by the pins 20, 20 during the revolution ci) the crank and also due to the interposin of the lbatde plates between the part of the casing containing the crank and Athe air cylinder. Furthermore, the interposing ofthe lshims between the crank casing and the airA cylinder, which are ori nally cast separ'ately, is of a decided a vantage in that it forms a convenient means for correcting the clearance in the said air chamber due to the Wear tween the connecting rod and the crankshaft. Such a correction could not be made if the crank casing and air cylinder were formed in one casting. A further advantage is gained in the use of the guide lugs 52 able and convenient means for guiding the valve disk 50 when it is desired to regrind it upon its seat, thuseliminating the use of a jig and making it possible to regrind the valve by hand. v

claim as my invention 1. In an air compressor, in combination with the crank casing containing a quantity of oil, the crank shaft, the air cylinder and the connecting rod, one or more battle j lates located in sald crank casing, each o said baiile plates being provided-with an opening 50 inthe ordinary operationof the.

upon its seat and returned tol hereinbefore.

.chamber 59 formed between the upper end 52 inasmuch as such lugs provlde a suitthrough which the connecting rod freely passes, and with other openings at its outer margin through which oil collected upon the upper face of said plate may drain.

2. In a vertical air compressor, in combination with the crank casing which is adapted to contain a quantity of oil, the air cylinder, the crank shaft, the connecting rod, one or more baille plates located in said crank casing between the crank shaft and the air cylinder, each of said plates being sloped from its central to its outer portion and pro vided through its center with an opening for the connecting rod and at its outer margin with drain holes.

3. In an air compressor, in combination with the crank casin containing a quantity of oil the crank sha t., the air cylinder and the connectin rod, one or more baie plates located in sai crank casing above the crank shaft, each of said baille plates being provided through its central portion with an opening through which the connecting rod freely passes and at its margin with drain holes, and said crank casing being provided above said bathe plates with one or more openings.

In testimony, as my invention presence of two witnesses, July A.. D. 1909.

JOHN WILLIS GARDNER.

Witnesses:

A. I-I. RAPP, GEO. A. WALL.

that I, claim the foregoing I aix my signature in the this 7th day of 

